My battle with a hidden crack in a heat exchanger taught me a hard lesson
I see too many folks just looking at parts and calling it good, but that's a sure way to miss big problems. Last month, I had this old heat exchanger that kept failing pressure tests, and I couldn't spot the leak. I tried the soap and water trick, but it didn't bubble up where I thought. Then I thought back to a cheap dye penetrant kit I bought years ago and never used. I cleaned the area, sprayed the dye, waited, and wiped it down with the developer. A thin line showed up right along a weld seam, clear as anything. Now I won't touch a suspect piece without doing this check first. It costs pennies and takes minutes, but so many skip it to save time. That laziness can lead to a blowout or worse, so don't cut corners.